[CentOS] To PAE or not to PAE...
JohnS
jses27 at gmail.com
Thu Jul 22 21:43:32 UTC 2010
On Thu, 2010-07-22 at 17:33 -0400, ken wrote:
> On 07/22/2010 02:39 PM Hakan Koseoglu wrote:
> > JD,
> > On 22/07/10 10:25, John Doe wrote:
> >> I was wondering if anyone would know the cons of running a PAE kernel...?
> >> I have a 4GB pc and was wondering if it was worth going the PAE way to gain
> >> those exta 700MB...
> > You should use 64 bit if possible but if you're seeing 3.2GB, it's more
> > likely that your motherboard is not capable (I have one of those here
> > right now).
> >
> >> In the past, I heard that these 700MB were normally reserved for bios or chipset
> >> stuff...
> > It still is, even with with 64 bit. If your motherboard supports
> > remapping this memory with 64 bit you can use the whole 4GB. Otherwise
> > you're limited to 3.2:
> >
> > hakan at photon:~$ free -m
> > total used free shared buffers cached
> > Mem: 3262 1972 1290 0 103 737
> > -/+ buffers/cache: 1131 2131
> > Swap: 7812 308 7504
> > hakan at photon:~$ arch
> > x86_64
>
> I'm trying to catch up...
>
> Is the 737M cached (in the output above) what is reserved for bios or
> chipset...? and what is gained back through remapping?
---
If you would look at my prior post you can actually see it as in whats
used. It is 2GB of ram on 12GB capability.
Run "dmesg | grep Memory" on your machine to see it.
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